Saia-Burgess Controls AG
Manual for PCD7.L79xN room controllers
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Document 27 / 602
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N02 │ 2013-11-27
Functions, master/slave
Function
3-28
3
3.7
Functions, master/slave
Concept
In master/slave operation, it is possible to use one (master) room controller to control
other (slave) controllers remotely. For this, the master simply uses the outputs from
the slaves to control conditions in the room.
Master/slave operation is generally implemented via the Room FBoxes. The master/
slave system used here is then so flexible that a Room FBox only has to be told
which S-Bus station address is the master for this room controller. Many controllers
can also be chained together. This allows e.g. a slave to be the master for another
device etc. A typical application would be in rooms that can be divided in different
ways, e.g. meeting rooms in conference facilities.
The master controller transmits its output signals for heating valve and cooling valve
to the slave. The hardware configuration in the slave then decides in turn which
outputs should actually be used. As described above, the unused outputs in the slave
can also be controlled independently via the S-Bus (RIO).
Room, master/slave parameters
The "Room controller works" parameter is used to define the operating mode as
Master = "autonomous" or Slave = "as slave".
In "as slave" mode, the master station address also has to be entered.
In the "Master" function, the parameter "Station is master station" has no meaning.
